<template>
  <div class="fa">
    <h3>父组件 count  {{count}}</h3>
    <VmodelChild v-model="count"/>
  </div>
</template>

<script setup>
import VmodelChild from './VmodelChild.vue';
import { ref } from 'vue'
const count = ref(123445)
</script>

<style>
.fa {
  border: 1px solid black;
  width: 300px;
  height: 300px;
}
</style>